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Former Beacon Station No,104 February 26,2003 Stockton California Preliminary Results Report and Work Plan Addendum . Stockpile drill cuttings at the site on and covered with visqueen. Collect four representative samples of the drill cuttings stockpile for characterization and disposal purposes. Monitoring well borings shall be 8 inches in diameter. Monitoring wells shall consist of 2-inch inside diameter (ID), flush-threaded, Schedule 40, polyvinyl chloride (PVC) casing and 2-inch ID, PVC, 0.020-inch slotted well screen. Install 43 sand filter pack adjacent to and extending approximately 2 feet above the screened intervals. The filter packs shall be sealed with approximately 5 feet of fine sand. Neat cement sanitary seals shall be set in the remaining annulus after installation of the filter packs and filter seals. The flush-mounted well heads shall be fitted with locking caps and the surface shall be completed with flush-mounted traffic-rated vault boxes. A typical monitoring well construction diagram is contained Appendix E. Submit selected soil samples from the new monitoring well borings and submit. under COC documentation, to Kiff for analysis of. TPHg, BTEX, the seven fuel oxygenates, DCA and DBA by EPA Method 826013. Additionally analyze the stockpile soil sample for total lead by EPA Method 6010. Task 3 Develop and sample the new monitoring wells according to Horizon Field Methods and Procedures. Survey the top-of-casing elevation of the new monitoring wells to GeoTracker specifications. I Submit groundwater samples, under COC documentation, to Kiff for analysis of. TPHg, BTEX, the seven fuel oxygenates, DCA and DBA by EPA Method 826013. Task 4 Prepare a report which documents installation of the additional monitoring wells and analytical results of soil and groundwater sampling. Evaluate the C:\Projects\1474\14\WPaddnm2-03.doc Project No. 1474.14 6 HORIZON ENVIRONMENTAL INC.